/Engine/Source/Runtime/Slate/Public/Widgets/Notifications/SNotificationList.h
Invoked when a notification item has finished fading out. Called by the faded item.
virtual void NotificationItemFadedOut ( const [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SNotificationItem](API\Runtime\Slate\Widgets\Notifications\SNotificationItem) > & NotificationItem )